I have a Centos 6.4 server that's being used as a Cassandra node in a production environment, it is still working and responding to queries etc, but the load average is rather "high" a.k.a. buggy? In ...

I feel certain this is something fairly basic that I'm missing, I'm new to Cassandra and very new to Opscenter and the agent. In brief, Opscenter is working fine and the agent install seems to have ...

I installed the OS version this recently (5.0.2) and am wondering about this graph. To date I've had a hard time finding a metric for 'cluster capacity' when it comes to Cassandra. Magically, datastax ...

I have gone through the recommended architecture of the Cassandra node configuration! according to which the recommended hardware infrastructure for the node is to have
RAM: 16-32 GB,
storage: 500GB ...

We installed opscenter and datastax agents on a cluster with private network through datastax community packages. Configurations seems to be ok and we don't have connectivity issues on jmx or stomp. ...

We have a 3 node Cassandra cluster with a small amount of data on 'em (about 2.3GB total). The nodes are hosted on GCE and each have four cores and 16GB memory. We're running the Debian package build ...

I've got a one-node Cassandra cluster which is currently stuck in a major compaction process. After executing a nodetool compactit started the compaction and I see the tmp-sstable files with a size of ...

For the sake of understanding I setup a 4 node cluster using the latest/greatest(released) version of Cassandra. The four nodes were brought up in sequence using almost entirely default settings and ...

I'm currently running Cassandra, the OpsCenter, and the OpsCenter agent all on my dev Windows box. The agent is successfully connected to OpsCenter and I can see it listed there along with the amount ...

How does one know when it's time to add capacity to a cassandra cluster? Error msgs? Performance? Some other tell-tale sign?
Since capacity planning with Cassandra is a (seemingly) black art knowing ...

I have setup apache cassandra on a centos7 compatible linux machine in azure. I can telnet directly to port 7000, etc on the IP address on the machine, however I cannot telnet to that same port from ...

I had 3 nodes with 1.5TB of data. At some point my import hit a wall as disk space ended on one of those 3 nodes. I've resized disks and added 4 more nodes and 1.5TB of data more.
I did also repair ...

Is there a way to authenticate to cassandra using the new cassandra-stress tool released with cassandra 2.1? It appears as if the '-un' (username) and '-pw' (password) switches have been removed from ...

I had 3 nodes, all with ~550GB, and added 4 more. I hoped that data would migrate on its own from old servers to new ones. Unfortunately after one day, data seems to stay in old places.
In parallel, ...

I am testing some DataStax Enterprise clusters in different AWS regions and working on a desirable architecture.
Currently - I have one cluster with datacenters in us-east, us-west, and eu-ireland. I ...

I have lots of perf graphs in datastax OpsCenter under my "admin" user.
I've created a new read-only user that i can let anyone in the company use, but how do i copy all the already configured perf ...

I have 3 cassandra nodes(S1,S2,S3) which are installed on CentOS 6. Two of them (S1,S2) are in datacenter A and one of them (S3) is in openshift. I am trying to make benchmark test with multiple node ...

I accidentally set a node to DC1 when it should have been DC2 . In cassandra-rackdc.properties
I started the node and in opscentre it added it to DC1. I then stopped the node and changed the config ...

I'm lunching an instance to host a Cassandra node and i'm testing some shutdown and startup scripts. The instance was lunched from the datastax PV AMI 'ami-8932ccfe'. I added 8GB of SSD EBS storage ...

I have a fresh installation of cassandra v2.0.8 on a RedHat Enterprise Linux v5.
I have added a sym link of the jna.jar in cassandra's /lib folder.
I start cassandra and it hangs after printing out ...